Re: [RFC 0/5] Enable f2fs support inline data

[Haicheng Li <haicheng.li@linux.intel.com>]

Hi Jaegeuk & Namjae,

Sure, we'll address your comments. And this version is RFC, just wanna to
make sure this feature is meaningful for f2fs project, and there is no obvious
mistake, e.g. missing some critical path.

And if you team has some special opensource test suites used in your daily
f2fs test cycle, pls. kindly share the info with us, then we can make sure our
patchset can pass these cases before we send out next version.

BTW, test the kernel source tree or kernel build is a good suggestion. thanks.

On Tue, Jun 04, 2013 at 01:23:57PM +0900, Namjae Jeon wrote:
> Hi. Huajun.
> 
> I agree jaegeuk's opinion.
> Additionally, It is better that you describe the effect in change-log
> when this feature is added to f2fs.
> e.g.
>     1. how much space is saved when storing kernel-tree(small files) ?
>     2. small files creation performance test.
>     3. file look-up performance test.
>     4. other performance tools 's result.
> 
> Thanks.
> 
> 2013/6/4 Jaegeuk Kim <jaegeuk.kim@samsung.com>:
> > Hi,
> >
> > This feature is one of my todo items. ;)
> > Thank you for the contribution.
> >
> > Before reviewing the below code intensively, we need to check the
> > following issues.
> >
> > - deadlock conditions
> > - FS consistency
> > - recovery routine
> >
> > Could you check one more time?
> > Thanks again,
> >
> > 2013-06-03 (월), 18:04 +0800, Huajun Li:
> >> f2fs inode is so large, small files can be stored directly in the inode,
> >> rather than just storing a single block address and storing the data elsewhere.
> >>
> >> This RFC patch set is just to enable f2fs support inline data: files less than
> >> about 3.6K can be stored directly in inode block.
> >>
> >> TODO: make small dirs inline too.
> >>
> >>
> >> Haicheng Li (3):
> >>   f2fs: Add helper functions and flag to support inline data
> >>   f2fs: Add interface for inline data support
> >>   f2fs: add tracepoints to debug inline data operations
> >>
> >> Huajun Li (2):
> >>   f2fs: Handle inline data read and write
> >>   f2fs: Key functions to handle inline data
> >>
> >>  fs/f2fs/Kconfig             |   10 +++
> >>  fs/f2fs/Makefile            |    1 +
> >>  fs/f2fs/data.c              |   78 +++++++++++++++++++++-
> >>  fs/f2fs/f2fs.h              |   70 +++++++++++++++++++
> >>  fs/f2fs/file.c              |    9 ++-
> >>  fs/f2fs/inline.c            |  156 +++++++++++++++++++++++++++++++++++++++++++
> >>  fs/f2fs/inode.c             |    8 +++
> >>  include/linux/f2fs_fs.h     |    5 ++
> >>  include/trace/events/f2fs.h |   69 +++++++++++++++++++
> >>  9 files changed, 402 insertions(+), 4 deletions(-)
> >>  create mode 100644 fs/f2fs/inline.c
> >>
> >
> > --
> > Jaegeuk Kim
> > Samsung
> --
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